only buy tank raised bangaiis. then getting them to pair is the hardest part as they will kill off competition trying to do so. after that, like any animal if they want to breed - they will, but thats on them.

I have a breeding pair with a fake urchin that I made out of pickup sticks and aqua putty. Ones I see the little ones has been released from the males mouth I remove the parents to a separate tank and drop the level in the Bangaii tank a little so no babies cant go to the filter chambers. I then run the Nano with a sponge filter and regular water changes. The fry I feed with a combination of Cyclopeeze and brine shrimp. I hope this helps a bit.